What is the term for music gradually becoming louder?

How many copies of a record album must be sold for the album to be awarded a "gold record"? Is it 1/2 million, 1 million, or 2 million copies?

Which 1878 Gilbert and Sullivan operetta was subtitled "The Lass that Loved a Sailor"?

Which song features the words, "Newspaper taxis appear on the shore"?

As a result of patriotism during the Gulf War, in 1991 Whitney Houston had an unlikely musical hit when she recorded what song?

The modern opera, Porgy and Bess, was written by whom, and takes place in which city?

This popular music style combines French, Caribbean and blues musical styles. It is frequently played on guitar, accordion, and washboard, and originated in Louisiana. What is it called?